CN212275130U - Pressure measuring device and liquid level measuring instrument - Google Patents
Pressure measuring device and liquid level measuring instrument Download PDFInfo
- Publication number
- CN212275130U CN212275130U CN202021186687.XU CN202021186687U CN212275130U CN 212275130 U CN212275130 U CN 212275130U CN 202021186687 U CN202021186687 U CN 202021186687U CN 212275130 U CN212275130 U CN 212275130U
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- pressure
- pressure sensor
- measuring device
- accommodating cavity
- pressure measuring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/18—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
Abstract
The utility model discloses a pressure measuring device and liquid level measurement appearance belongs to pressure and liquid level measurement technical field. The pressure measuring device comprises a shell, a first joint component, a second joint component, a pressure sensor and a locking component, wherein an accommodating cavity for accommodating gas is formed in the shell; one end of the first joint component is communicated with the accommodating cavity, and the other end of the first joint component is communicated with an external air source and can charge compressed air into the accommodating cavity; one end of the second joint component is communicated with the accommodating cavity, and the other end of the second joint component is communicated with the fluid to be measured; the pressure sensor is hermetically arranged in the accommodating cavity and used for measuring the pressure of the compressed air in the accommodating cavity; the retaining member is disposed between the pressure sensor and the housing, and the retaining member is used to retain the pressure sensor. The liquid level measuring instrument comprises the pressure measuring device. The utility model discloses a pressure measuring device and liquid level gauge, stable in structure, the integrated level is high, the assembly of being convenient for, the reliability is high, and application scope is wide.
Description
Technical Field
The utility model relates to a pressure and level measurement technical field especially relate to a pressure measuring device and liquid level measuring instrument.
Background
Fluid pressure signal measurement is a very common measurement technical means, and the traditional pressure measurement device mainly has two modes of an absolute pressure mode and a differential pressure mode. The absolute pressure obtained by the absolute pressure type measurement mode is the sum of the pressure of the fluid to be measured and the atmospheric pressure of the surrounding environment, the atmospheric pressure is not a constant value, and the absolute pressure is easily influenced by various factors such as the atmospheric pressure in different regions and different time periods, and the measurement precision is low.
The existing differential pressure type measuring mode needs to put a measuring device into fluid to be measured, and the measuring device has higher requirement on environment. For example, if gas in the gas environment to be tested is corrosive, the testing device is easily corroded, and the testing precision is affected; or more suspended matters exist in the liquid environment to be tested, the suspended matters, microorganisms and the like can be attached to the surface of the testing device, so that the clogging of the testing device is caused, the measurement precision and the sensitivity are greatly reduced, and the use of the testing device is influenced.
The existing non-contact measuring device, such as a bubble type water level measuring instrument, is characterized in that an air pipe is directly arranged on a pressure sensor, the air pipe is put into water to be measured for pressure intensity detection, and water vapor can contact the pressure sensor through the air pipe, so that the water resistance is poor, and the service life of the pressure sensor is influenced; generally, a stainless steel air duct or a plastic air duct interface is adhered to a pressure sensor through glue, an air duct is connected and inserted on the stainless steel or plastic air duct interface, force is required to be applied properly in the inserting process, otherwise the stainless steel or plastic air duct interface is easy to fall off, and the assembly is inconvenient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pressure measuring device, compact structure is stable, and the integrated level is high, the assembly of being convenient for, the reliability is high, and is applicable to multiple measuring environment.
In order to realize the purpose, the utility model adopts the following technical scheme:
a pressure measurement device, comprising:
the shell is internally provided with an accommodating cavity for accommodating gas;
one end of the first joint component is communicated with the accommodating cavity, and the other end of the first joint component is communicated with an external air source and can charge compressed air into the accommodating cavity;
one end of the second joint component is communicated with the accommodating cavity, and the other end of the second joint component is communicated with the fluid to be measured;
the pressure sensor is hermetically arranged in the accommodating cavity and used for measuring the pressure of the compressed air in the accommodating cavity;
and the locking piece is arranged between the pressure sensor and the shell and used for locking the pressure sensor.
Optionally, the shell is provided with a connecting hole communicated with the accommodating cavity, the locking piece is installed in the connecting hole, the accommodating cavity is provided with a step, and the pressure sensor is arranged between the step and the locking piece.
Optionally, one end of the accommodating cavity close to the connecting hole is provided with a chamfer.
Optionally, the pressure measuring device further comprises a waterproof rubber mat, and the waterproof rubber mat is installed between the chamfer and the pressure sensor.
Optionally, the pressure sensor comprises a gauge pressure sensor body, a waterproof air duct connected to the gauge pressure sensor body and a waterproof vent plug installed in the waterproof air duct, a through hole is formed in the locking piece, and the waterproof air duct is arranged in the through hole in a penetrating mode.
Optionally, the pressure measuring device further comprises a first sealing medium, and the first sealing medium seals the pressure sensor through the through hole.
Optionally, the pressure measuring device further comprises a second sealing medium, and the second sealing medium is sleeved on the waterproof air duct and is arranged between the locking member and the shell.
Optionally, the second sealing medium seals off an end of the locking element remote from the pressure sensor.
Optionally, the first sealing medium is a potting adhesive or a nano coating; and/or the second sealing medium is pouring sealant or a nano coating.
Another object of the present invention is to provide a liquid level measuring instrument, which has high reliability and low cost.
In order to realize the purpose, the utility model adopts the following technical scheme:
a liquid level measuring instrument comprises the pressure measuring device.
The utility model has the advantages that:
the utility model provides a pair of pressure measuring device, when measuring the liquid level, second joint Assembly and fluid intercommunication that awaits measuring fill compressed air to holding the intracavity through first joint Assembly, avoid the fluid that awaits measuring to enter into and hold the intracavity, liquid that awaits measuring does not get into second joint Assembly until, compressed air does not spill over second joint Assembly simultaneously, at this moment, the fluidic pressure that awaits measuring equals with the compressed air pressure that holds the intracavity, pressure sensor measures the pressure that holds the compressed air of intracavity, can obtain the fluidic pressure that awaits measuring. The fluid to be measured is isolated from the pressure sensor through compressed air, non-contact measurement is realized, the pressure sensor is prevented from directly contacting the fluid to be measured to influence the use of the pressure sensor, the reliability and the service life of the pressure sensor are improved, and the use cost is reduced; the second joint component is contacted with the fluid to be measured, so that the second joint components made of different materials can be used according to different use environments, the pressure intensity measurement device can be suitable for measuring the pressure intensity under different environments, and the application range is wide; the retaining member is used for locking the pressure sensor, so that the pressure sensor is fixed on the shell, the structure is stable, and the reliability is high.
The utility model provides a pair of liquid level measuring instrument through adopting foretell pressure measuring device, utilizes data conversion to realize the liquid level test, and the measuring accuracy is high, stability is high, the reliability is high, reduces use cost.
Drawings
Fig. 1 is a schematic structural diagram of a pressure measuring device according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a cross-section of a housing according to an embodiment of the present invention;
FIG. 4 is an enlarged view at A of FIG. 3;
fig. 5 is a cross-section of a locking member according to an embodiment of the present invention.
In the figure:
1-a shell; 11-a containment chamber; 111-step; 112-chamfering; 12-a connection hole;
2-a pressure sensor; 21-gauge pressure sensor body; 22-waterproof gas-guide tube;
3-a first joint assembly; 31-a first conduit fitting; 32-a first lock nut;
4-a second joint assembly; 41-a second conduit fitting; 42-a second lock nut;
5-a one-way valve; 6-a first seal; 7-a second seal; 8-a third seal; 9-a first sealing medium;
10-a locking member; 101-a through hole;
20-an output cable; 30-a second sealing medium.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The embodiment provides a pressure measuring device, which can be applied to industrial measurement, such as pressure measurement of accumulated water in dispensing cans, overpass tunnels and the like, further calculates water level based on the pressure, and is applied to the fields of coffee machines and other electrical products. As shown in fig. 1, the pressure measuring apparatus includes a housing 1 and a first joint assembly 3 and a second joint assembly 4 coupled to the housing 1. Specifically, as shown in fig. 2, an accommodating cavity 11 for accommodating gas is formed in the housing 1, the accommodating cavity 11 is internally provided with the pressure sensor 2 in a sealing manner, one end of the first joint assembly 3 is communicated with the accommodating cavity 11, the other end of the first joint assembly is communicated with an external gas source, and compressed air can be filled into the accommodating cavity 11; one end of the second joint component 4 is communicated with the accommodating cavity 11, and the other end is communicated with the fluid to be measured; the pressure sensor 2 is used for measuring the pressure of the compressed air in the accommodating cavity 11; the pressure measuring apparatus further includes a locker 10 disposed between the pressure sensor 2 and the housing 1, the locker 10 for locking the pressure sensor 2.
When the pressure of the fluid is measured, the second joint component 4 is communicated with the fluid to be measured, compressed air is filled into the accommodating cavity 11 through the first joint component 3, the fluid to be measured is prevented from entering the accommodating cavity 11 until the liquid to be measured does not enter the second joint component 4, meanwhile, the compressed air does not overflow the second joint component 4, at the moment, the pressure of the fluid to be measured is equal to the pressure of the compressed air in the accommodating cavity 11, and the pressure sensor 2 measures the pressure of the compressed air in the accommodating cavity 11, so that the pressure of the fluid to be measured can be obtained. The fluid to be measured is isolated from the pressure sensor 2 through compressed air, non-contact measurement is realized, the pressure sensor 2 is prevented from being directly contacted with the fluid to be measured to influence the use of the pressure sensor 2, the reliability and the service life of the pressure sensor 2 are improved, and the use cost is reduced; the second joint component 4 is contacted with the fluid to be measured, the second joint components 4 made of different materials can be used according to different use environments, the pressure intensity measurement under different environments can be suitable, and the application range is wide; the locking piece 10 is used for locking the pressure sensor 2, so that the pressure sensor 2 is fixed on the shell 1, and the structure is stable and the reliability is high.
As shown in fig. 2 and 3, specifically, a connecting hole 12 communicated with an accommodating cavity 11 is formed in a housing 1, a locking member 10 is installed in the connecting hole 12, a step 111 is arranged on the accommodating cavity 11, a pressure sensor 2 is arranged between the step 111 and the locking member 10, the locking member 10 and the step 111 can limit the position of the pressure sensor 2, when the gas pressure in the accommodating cavity 11 is large, the locking member 10 can prevent the pressure sensor 2 from being pushed under the action of the gas pressure, and the measurement accuracy of the pressure sensor 2 is improved; when pressure sensor 2 is installed, step 111 can play pressure sensor 2's limiting displacement, avoids pressure sensor 2 to receive the exogenic action and removes often, has improved pressure sensor 2's installation stability.
Further alternatively, as shown in fig. 3 and 4, one end of the accommodating cavity 11 close to the connecting hole 12 is provided with a chamfer 112, since one end of the pressure sensor 2 close to the step 111 cannot be pressed by the step 111, otherwise, the measurement accuracy is affected, therefore, when assembling, the chamfer 112 is taken as a reference, the pressure sensor 2 is prevented from being pressed on the step 111, and the convenience of assembling the pressure sensor 2 and the convenience of manufacturing the accommodating cavity 11 are improved.
Further optionally, the pressure measuring apparatus further includes a waterproof rubber pad for waterproofing of the pressure sensor 2, specifically, the waterproof rubber pad is installed between the chamfer 112 and the pressure sensor 2, and the chamfer 112 provides an installation space for the waterproof rubber pad, so that the structure is compact.
Alternatively, the pressure sensor 2 may be any one of an absolute pressure sensor, a gauge pressure sensor, or a differential pressure sensor, and may implement pressure measurement of the compressed air in the accommodating chamber 11; in the embodiment, the pressure sensor 2 adopts a gauge pressure sensor, and the gauge pressure sensor can eliminate the influence caused by atmospheric pressure change in different regions and different time periods and eliminate the influence caused by atmospheric pressure change in different regions and different time periods, so that the pressure measurement data is more accurate and reliable; as shown in fig. 2 and 5, in this embodiment, the pressure sensor 2 includes a gauge pressure sensor body 21, a waterproof air duct 22 connected to the gauge pressure sensor body 21, and a waterproof air-permeable plug installed in the waterproof air duct 22, the locking member 10 is provided with a through hole 101, and the waterproof air duct 22 is inserted into the through hole 101; when the gauge pressure sensor is used for a long time, the inside may enter steam, the waterproof air duct 22 timely discharges the steam on the gauge pressure sensor body 21 to the outside, and meanwhile, the waterproof ventilation plug is arranged in the waterproof air duct 22, and the steam is prevented from entering the gauge pressure sensor body 21 through the waterproof air duct 22.
In order to further improve the sealing performance of the pressure sensor 2, in the embodiment, the pressure sensor 2 and the locking member 10 are both arranged in the housing 1 in a sealing manner.
Specifically, the pressure measuring device further comprises a first sealing medium 9, the first sealing medium 9 seals the pressure sensor 2 through the through hole 101, external water vapor is prevented from entering the pressure sensor 2 through the through hole 101, and sealing performance is improved.
Specifically, the pressure measuring device further comprises a second sealing medium 30, the second sealing medium 30 is sleeved on the waterproof air duct 22, and a gap between the waterproof air duct 22 and the through hole 101 is further sealed; the second sealing medium 20 is disposed between the locking member 10 and the housing 1, and prevents external moisture from entering the pressure sensor 2 through the installation gap between the locking member 10 and the housing 1, thereby further improving the sealing property. As shown in fig. 5, in the present embodiment, an external thread is provided on the outer circumference of the locker 10, the locker 10 is screwed with the coupling hole 12, the second sealing medium 30 is sealed at an end of the locker 10 away from the pressure sensor 2, and the second sealing medium 30 can seal the screw gap.
Optionally, the first sealing medium 9 and the second sealing medium 30 are potting glue or a nano coating.
Alternatively, the housing 1 is made of a metal material or an engineering plastic material, and preferably, the housing 1 is made of a stainless steel material.
Optionally, the pressure measuring device includes a check valve 5 connected to the first joint component 3, so that external compressed air can be filled into the accommodating cavity 11, and the gas in the accommodating cavity 11 is blocked from overflowing from the first joint component 3, thereby avoiding leakage of the compressed air and improving accuracy of the pressure test. In addition, the one-way valve 5 is arranged, so that compressed air can be stably filled into the accommodating cavity 11, and the impact on the pressure sensor 2 is avoided. Optionally, the check valve 5 can be installed in the accommodating cavity 11, so that the integration of the pressure measuring device can be improved; alternatively, the check valve 5 may also be mounted outside the housing 1, facilitating the mounting of the check valve 5. In this embodiment, two check valves 5 are installed in the housing 1, so that the use reliability is improved, and the maintenance is reduced. In order to improve reliability and reduce maintenance, a plurality of check valves 5 may be installed in other embodiments.
Optionally, the one-way valve 5 is sealingly connected to the receiving chamber 11. Optionally, the one-way valve 5 is connected to the housing 1 by a third seal 8. As shown in fig. 2, in this embodiment, the third sealing element 8 is a sealing ring, and the sealing ring is installed between the periphery of the check valve 5 and the inner hole of the accommodating cavity 11, so that the check valve 5 and the accommodating cavity 11 are sealed, and the influence of air leakage on the measurement effect is avoided.
In an embodiment, the first connector assembly 3 comprises a first conduit connector 31 connected to the housing 1 and a first lock nut 32 connected to the first conduit connector 31; and/or the second connector assembly 4 comprises a second conduit connector 41 attached to the housing 1 and a second lock nut 42 attached to the second conduit connector 41. The first conduit connector 31 and the second conduit connector 41 are each screwed to the housing 1. Optionally, sealing connection is performed through a sealant or a hydraulic adhesive tape, air leakage is prevented, and measurement accuracy is improved. In an alternative embodiment, the air tube is installed through the first conduit connector 31, the air pump fills compressed air into the accommodating cavity 11 through the air tube, and the first locking nut 32 locks the air tube on the first conduit connector 31, so that the influence of instable installation of the air tube on use is avoided. In a similar way, the second pipe joint 41 is provided with an air pipe, the air pipe is put into the liquid of the fluid to be measured, and the second lock nut 42 locks the air pipe on the second pipe joint 41, so that the air pipe and the second pipe joint 41 are stably installed, and the use reliability is improved. Further optionally, the first joint component 3 and the second joint component 4 have the same specification and size, and can be replaced with each other, so that the assembly convenience is improved.
Optionally, the first joint assembly 3 is sealingly connected to the housing 1. Optionally, the first joint assembly 3 is connected to the housing 1 by a first seal 6. As shown in fig. 2, in the present embodiment, the first sealing member 6 is a sealing ring, a groove is provided on the first conduit joint 31, and the sealing ring is mounted in the groove and the other end of the sealing ring abuts against the housing 1, so that the first conduit joint 31 and the housing 1 are sealed.
Optionally, the second joint assembly 4 is sealingly connected to the housing 1. The second joint assembly 4 is connected to the housing 1 by a second seal 7. As shown in fig. 2, in the present embodiment, the second sealing element 7 is a sealing ring, and similarly, a groove is formed on the second conduit joint 41, the sealing ring is installed in the groove, and the other end of the sealing ring abuts against the housing 1, so that the second conduit joint 41 and the housing 1 are sealed. Alternatively, the first seal 6 and the second seal 7 may be used interchangeably as the first joint assembly 3 and the second joint assembly 4 are used interchangeably.
The embodiment also provides a liquid level measuring instrument, which comprises the pressure measuring device, a measuring air chamber which is arranged on the second joint component 4 and is communicated with the liquid to be measured, an air source component which is communicated with the first joint component 3, and an output cable 20 which is electrically connected with the pressure sensor 2 and is used for transmitting the measured data to the outside.
During testing, the measuring air chamber is put into liquid to be tested, compressed air is supplemented into the accommodating cavity 11 through the first connector, the pressure sensor 2 measures the pressure of the compressed air in the accommodating cavity 11, and measured data are processed through data conversion, so that corresponding water level height data can be obtained.
Optionally, a temperature sensor is further installed in the accommodating cavity 11 to obtain the pressure of the fluid to be measured at different temperatures. Optionally, the temperature sensor is electrically connected to the output cable 20, and performs data compensation processing through a temperature compensation algorithm, so as to improve the test accuracy. Optionally, the pressure sensor 2 and the temperature sensor are electrically connected to the same circuit board, and during measurement, the temperature sensor and the pressure sensor 2 both transmit data to the outside, and perform compensation processing on the measurement result of the pressure sensor 2 according to different temperatures, so that pressure data compensation and calibration in different temperature environments are realized, consistency and reliability of pressure measurement data are ensured, and the measurement result is more accurate. Optionally, the output cable 20 is a 4pin signal cable with terminal connections for transmitting the pressure signal and the temperature signal.
Optionally, the pressure measuring device further comprises a power supply module for providing a dc regulated power supply for the pressure sensor 2 and the temperature sensor, and realizing overvoltage, overcurrent or overheat protection; optionally, the pressure measuring device further includes a data processing module, which processes and decodes the pressure signal measured by the pressure sensor 2, in this embodiment, the temperature signal detected by the temperature sensor is subjected to data compensation processing by a temperature compensation algorithm; optionally, the pressure measuring device further comprises a data transmission module for latching the data processed by the data processing module and supporting a third-party device or an upper computer software instruction query function; the output signal may be in the form of a wired signal, and may be in the form of any UART signal such as IIC/232/485.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A pressure measurement device, comprising:
the gas-filled compressor comprises a shell (1), wherein an accommodating cavity (11) for accommodating gas is formed in the shell;
one end of the first joint component (3) is communicated with the accommodating cavity (11), the other end of the first joint component is communicated with an external air source, and compressed air can be filled into the accommodating cavity (11);
one end of the second joint component (4) is communicated with the accommodating cavity (11), and the other end of the second joint component is communicated with the fluid to be measured;
the pressure sensor (2) is hermetically arranged in the accommodating cavity (11) and is used for measuring the pressure of the compressed air in the accommodating cavity (11);
a locking member (10) disposed between the pressure sensor (2) and the housing (1), the locking member (10) being for locking the pressure sensor (2).
2. A pressure measuring apparatus according to claim 1, wherein the housing (1) is formed with a coupling hole (12) communicating with the receiving chamber (11), the locking member (10) is installed in the coupling hole (12), the receiving chamber (11) is provided with a step (111), and the pressure sensor (2) is disposed between the step (111) and the locking member (10).
3. A pressure measuring device as claimed in claim 2, characterized in that the end of the receiving chamber (11) near the connecting hole (12) is provided with a chamfer (112).
4. A pressure measuring device as claimed in claim 3, characterized in that the pressure measuring device further comprises a waterproof rubber mat, which is mounted between the chamfer (112) and the pressure sensor (2).
5. The pressure measuring device of claim 1, wherein the pressure sensor (2) comprises a gauge pressure sensor body (21), a waterproof air duct (22) connected to the gauge pressure sensor body (21), and a waterproof air-permeable plug installed in the waterproof air duct (22), a through hole (101) is formed in the locking member (10), and the waterproof air duct (22) is arranged in the through hole (101) in a penetrating manner.
6. A pressure measuring device as claimed in claim 5, characterized in that the pressure measuring device further comprises a first sealing medium (9), which first sealing medium (9) seals the pressure sensor (2) through the through hole (101).
7. A pressure measuring device as claimed in claim 6, characterized in that the pressure measuring device further comprises a second sealing medium (30), which second sealing medium (30) is fitted over the water-tight gas-conducting tube (22) and is arranged between the locking element (10) and the housing (1).
8. A pressure measuring device as claimed in claim 7, characterized in that the second sealing medium (30) seals off at an end of the retaining member (10) remote from the pressure sensor (2).
9. Pressure measuring device according to claim 7, characterized in that the first sealing medium (9) is a potting compound or a nanocoating; and/or the second sealing medium (30) is a potting adhesive or a nanocoating.
10. A liquid level gauge comprising a pressure measuring device according to any one of claims 1-9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020102611556 | 2020-04-03 | ||
| CN202010261155.6A CN111289168A (en) | 2020-04-03 | 2020-04-03 | Pressure measuring device and liquid level measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212275130U true CN212275130U (en) | 2021-01-01 |
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ID=71031177
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010261155.6A Withdrawn CN111289168A (en) | 2020-04-03 | 2020-04-03 | Pressure measuring device and liquid level measuring instrument |
| CN202021186687.XU Active CN212275130U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202021190508.XU Active CN212513441U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202010583797.8A Pending CN111537134A (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
| CN202021190548.4U Active CN212158908U (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010261155.6A Withdrawn CN111289168A (en) | 2020-04-03 | 2020-04-03 | Pressure measuring device and liquid level measuring instrument |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021190508.XU Active CN212513441U (en) | 2020-04-03 | 2020-06-23 | Pressure measuring device and liquid level measuring instrument |
| CN202010583797.8A Pending CN111537134A (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
| CN202021190548.4U Active CN212158908U (en) | 2020-04-03 | 2020-06-23 | Fluid pressure measuring device and liquid level measuring instrument |
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| CN (5) | CN111289168A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112747791A (en) * | 2020-12-29 | 2021-05-04 | 陈欣彦 | Steam pressure and water level integrated measuring mechanism of horizontal industrial boiler |
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2020
- 2020-04-03 CN CN202010261155.6A patent/CN111289168A/en not_active Withdrawn
- 2020-06-23 CN CN202021186687.XU patent/CN212275130U/en active Active
- 2020-06-23 CN CN202021190508.XU patent/CN212513441U/en active Active
- 2020-06-23 CN CN202010583797.8A patent/CN111537134A/en active Pending
- 2020-06-23 CN CN202021190548.4U patent/CN212158908U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111289168A (en) | 2020-06-16 |
| CN212513441U (en) | 2021-02-09 |
| CN212158908U (en) | 2020-12-15 |
| CN111537134A (en) | 2020-08-14 |
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